Rotary engine



S. D. GILSON. ROTARY ENGINE.

No. 103,869. Patented June 7, 1870.

itubsm UNITED STATES PATENT OFFICE.

ROTARY ENGINE.

Specification forming partof Letters Patent No. 103,869, dated June 7,1870.

. .lo all whom it may concern:

Be-it known that I, SAMUEL D. GILSON, of Syracuse, Onondaga county, inthe State of New York, have invented a new and useful Improvement inSteam Pumping-Engines;

represents a side elevation of the engine. Fig.

2 is a horizontal section of Fig. 1 on the line or a". Fig. 3 is avertical section of Fig. 2 on the line-3111]. Fi 4 is a detailed view,showing the engine-crank reversed from the position seen in Fig. 1. p

Similar letters of reference indicate correponding parts. Ais thecylinder. B is the engine-shaft. (J is the piston. 1) D are theinduction-ports. E is the exhaust-porn F is the valve, which isa'roeking or oscillating valve. G is the steam-pipe connecting with theboiler. H is the exhaust-chamber atlheend of the cylinder. From this itwill be seen; that the piston does not make a full revolution in thecylim der, but has a reciprocating motion, the steam being appliedalternately on each of its sides. The valve is so arranged that thepiston is cushioned by steam on the heads I I at the termination of eachvibration. As seen in Fig. 3, the piston is taking steam from the port Dand exhausting it from the port D. The exhaust-steam passes into thechamber H on the end of the cylinder and escapes through the pipe J,Fig. 1.

K is a crank on the end of the shaft B. L is cam connected with thecrank, by means of which thevalve F is operated. M is an arm on the endof the valve-stem, which works in and is guided by a slot in the standN. As

.the crank moves back and forth with a motion corresponding with that ofthe piston the angles of the cam are brought in contact with arm M,raising and lowering it, and consequently oscillating the valve F. Themanner in which the cam operates upon thearm is plainly shown in Figs. 1and 4.

O is a revolving shaft, supported by the engine-frame, which isconnected with the engine-shaft B by means of the crank 1 on its end andthe connecting-rod R. S is a flywheel on the shaft.- The crank K on theengine-shaft B is carried more than half ofa revo lotion and less than awhole one at each'h'alfstroke of the piston, a whole stroke of thepistonbeing performed when it returns to the head I, from whence it started.The crank K is carried past thevertical center line at each vibration,audit is'longer or has abroader sweep than the crank I, so that at thetermination of each vibration of K the crank P is carried past thecentral linevof the connecting-rod It and performs a wholercvolutienwhile the piston performs a single vibration or half-stroke.

- In applying this engine to pumpingpurposes-(or completing afire-engine) the cylin:

der of the pump is attached to the enginesh-aft B, and the pump itselfis constructed and operated upon the same principle as the engine in allrespects.

It will be seen that by varying the, position or throw of the valve thesteam may be cut off at anypart ofjhe stroke, so that it may be workedexpansively to any desired extent.

In applying the engine to other purposesr than pumping in the mannerdescribed, the power is taken from the rotating shaft 0.

In using the engine exclusively for pumpin g, the shaft 0 and the partsconnected therewith are dispensed with.

Having thus described my invention, I. claim -as new and desire to soonre by Letters Patent- The above specification of myinventicn signed byme this 5th day of J annary,1870.

SAML. D. GILSON. Witnesses DAVID MIsELL, ALEX. F. Ronnnrs.

